1. Rheumatology and Rehabilitation Department, Faculty of Medicine, Zagazig University, Egypt
2. Medicine Department, Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia
3. Medical Biochemistry Department, Faculty of Medicine, Zagazig University, Egypt
4. Department of Laboratory Medicine, Faculty of Applied Medical Science, Umm Al-Qura University, Makkah, Kingdom of Saudi Arabia